The Going-to-the-Sun Road Triple Arches Bridge is a contributing feature to the Going-to-the-Sun Road NHL. The Road is eligible under NHL criteria 1 and 4. The Road is significant in the areas of Landscape Architecture, Transportation and Politics/Government. Period of Significance 1921-1952.

Long Significance Description:

The Going-to-the-Sun Road Triple Arches Bridge is a contributing feature to the Going-to-the-Sun Road NHL. The Road is eligible under NHL criterion 1 for its association with the American park movement and the initiation of “landscape engineering” and Criterion 4 as an exceptionally valuable example of American landscape architecture and specifically as a distinctive and outstanding example of “landscape engineering” that blended the practices of civil engineering and landscape architecture. The Going-to-the Sun Road Historic District is also nationally significant in the history of technology (transportation) because of its unprecedented engineering and its place as a link in the Park-to-Park Highway. The Road is also significant under NHL Theme III. Expressing Cultural Values #5 Architecture, Landscape Architecture, and Urban Design and Theme VII Transforming the Environment #3 Protecting ad Preserving the Environment. The Road is significant in the areas of Landscape Architecture, Transportation and Politics/Government. Period of Significance 1921-1952.

The Going-to-the-Sun Road Triple Arches Bridge is a contributing feature to the Going-to-the-Sun Road Historic District under NR Criteria A - Transportation, Recreation, Engineering. The Road signifies the increase in importance of auto traffic in national parks and the accessibility of more of the park to the public.